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no, it is not your fault. you just need to step off of your imaginary cloud and stop being a jerk to people and telling them that they are stupid and you are smarter than them by trying to use a riddle to get them to understand what is wrong. but i truly think you dont need to be posting on a...

simple problem. funny stuff there. you sound like one of those kind of guys who belittles people online to make up for being bullied in high school or other short comings. bad idle has never been an issue or fuel pressure. so after a year of daily searching, fsm reading, tech bulletin reading...

hey jetdick, i have NEVER seen you post ANYTHING positive on this forum. i have fixed everything wrong that i have found. this is the only problem there is with this swap. everything else is good and trail ready. double and triple checking all wiring, cps, tps, afm, ect sensor, knock sensors...

thanks for the reply. the first video had a exhaust leak due to the hole for the egt sensor i had to send back (it was warrantied). the afm s i have do have the honey comb inside and i have swapped out 3 of them and still the same problem. when i unhook the hac it runs better and does not...

still no luck figuring this out.....

so didnt fix the problem, just made it less bad. i did not wire in the hac. once i wired in the hac the problem came back just as bad. i think with the hac not wired in the ecu dumped more fuel or retarded the timing and caused it to run better. so still open to suggestions. i am going to try a...

so didnt fix the problem, just made it less bad. i did not wire in the hac. once i wired in the hac the problem came back just as bad. i think with the hac not wired in the ecu dumped more fuel or retarded the timing and caused it to run better. so still open to suggestions. i am going to try a...

i would rather waste time than money. learning how things work through gaining knowledge and info through experimentation and form written documents and otherspersons is how you figure things out....just as all of the mechanics and all professionals ever became who and what they are. thanks.

-ok so i just checked the tps at the ecu with it running. -vta at idle is .48 volts -the stumble starts at .74 volts. (also at 2500 rpm) -once the stumble starts if i press down on the petal it increases in volts to the ecu up to ~3.7v. -so i am back to thinking it is a boost/egr/vac leak or...

i installed a 20 ohm resistor and used a 25 ohm rheostat to make the voltage divider so i could adjust the volts going to the ecu from the hac sensor plug. the idle changes as i change the volts from 2.8 to 3.8. seems that when i turn it towards 2.8v the stumble is worse and when i turn it up...

internal igniter ground is good

coil packs made it a little better but still heavy stumble. if the ground going from the metal coil pack bracket is not hooked up it runs just the same. then if i ground it, it still acts the same. i think i remember reading if it does not have a good ground it will not run right. so what am i...

yes i did not see any cracks but i might get a new set with the coil packs and wires.

what the bottom of 2 of the coils look like

waiting for new coil packs....if they ever come in, they were to be here today so i dont know. here r some videos of drive by's. when it bucks in the first video i am holding the petal steady. when it hesitates it does that with the petal steady and if i push down it is just like n the video of...

would a coil pack with a small crack from the edge of the metal underneath cause a problem like this? would the coil test ok if it were cracked? the hac is working again. today it is 3.05 and yesterday it read 3.8v. so ???

i dont have a revving idle. and vacuum is around 16-18 at idle. only manual i have is a haynes and the turboninjas online fsm for a 87. so 750 torr = 750 mm hg. 750 mm hg = roughly 358 ft elevation = 3.6v 540 mm hg = roughly 9150 ft ele = 2.8v so 6500 ft ele = 620.5 mmhg = ~3.1059 v i wish...

ok the voltage going to the ecu from the hac is 3.04. does that sound about right for 6500 ft elevation (if anyone knows)? that is some good info and i will give it a shot tomorrow. there is NO difference if i unplug the O2 sensor. nothing.....? if i unplug the tps or the afm it wont run...

my hac ohm measurements is vc-p = .786 k ohm vc-e2 = 2.89 k ohm p-e2 = 3.67 k ohm so the vc-p is not in spec. does anyone have one they can test and see what they get? i am using a 114 fluke digital meter page 121 http://www.turboninjas.com/mk3supra/1987/04-EFISystem.pdf

i have a feeling it is in the HAC. when i have it connected, the tps at the ecu it is 2.8 k ohms. when it is unplugged it is 4.8k ohms. with it plugged in it runs worse and with it unplugged it runs like in the video. so????????? there is 4.8 volts from the ecu going to the hac with the ign key...